NoldirIt is true that several manufacturers are using the same vendor. However, even if they look the same the internal components are not necessarily the same. We have worked with OEM factories few times and always try to add some extra or swap components here and there to improve the performance.
Also one comment to add, if you are iPhone or iPad user - AAC is vital. The BTR100 supports AAC.
NoldirNot sure if I understood correctly. Normally brands do share which codes are supported. If they don´t list AAC then it is not supported as there is a royalty fee involved.